The iliotibial band is an anatomical structure that serves to reinforce the so-called fascia lata. The fascia lata itself is a kind of connective tissue covering around the outer thigh muscles. The actual function of the iliotibial band consists in the "tension band" against laterally directed physical forces.
More precisely, “tension banding” is a fixed tension on the side facing away from the load through contraction of the muscles. One also speaks of a reduction in "varus stress". In medical terminology, the iliotibial band is also known as the aponeurosis on the lateral thigh. The iliotibial band is a kind of link between the knee and hip.
In general, the iliotibial band arises from the Tendon fibers of the following muscles
Tensor fasciae latae muscle
This muscle is one of the outer hip muscles originating from the anterior upper iliac spine and its tendons radiate into the iliotibial tract
Gluteus maximus muscle
Very strong muscle with a broad tendon originating on the posterior surface of Cross- or. coccyx has and has its insertion in the anterior part (towards the pelvis) of the iliotibial band
(Fascia of) Gluteus medius muscle
As a muscle, it is almost completely covered by the gluteus maximus described above. It arises from the ilium of the pelvis and flows into the large rolling mound of the femur.
Of the origin this connective tissue surface is the Anterior superior iliac spine (anterior upper iliac spine) and has hers approach at the lateral bony prominence of the tibia. This protruding bone is also called "Gerdy humps" designated. During the Extension or flexion movement of the kneeas is the case with running, slides the iliotibial band over the lateral articular process of the femur. At a excessive stressAs happens in marathon runners, it can become a Irritation with inflammatory processes the sinewy structure. This is used as terminology here "Iliotibial Tract Syndrome" (ITBS). Pain and Impairments in everyday walking are the consequence. In addition to significant pain when walking or running, there is also a significant, painful swelling on the lateral area of the femur protrusion.